Relay



Patented may la, |899. P. coLEmAN.

l E L AY (Application lod Iy 25, 1898.1

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WITNESSES:

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TH: nonms PETERS co, PNOTQUTHO., WASMNQTQN, u. c`

No. 625,146. Patented May I6, |899. J. P. COLEMAN.

RELAY.

(Application lod my 25, 1898.) (In Model.) 3 Sheets-Sheet 2.

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WITNESSES: INVENTOR,

TH: Nonms PETERS Co. PHoYouTrm.,wAsn|NGroN. u, s:4

No. 625,146. Patented May I6, |899. J. P. COLEMAN.

RELAY.

(Application Bled Hay 25, 1898.) (No Model.) 3 Sheets-Shack 3.

WITNESSES: INVENTOR,

Tn: Ndnms PETERS ou. FNoTo-Llmo.. WASHINGTON. n. cA

UNITED' STATES PATENT OFFICE.

.IOI'IN PRESSLEY COLEMAN, OF EDGEIVOOD PARK, PENNSYLVANIA, ASSIGNOR TOTIIE UNION SYVITCH AND SIGNAL COMPANY, OF

SVISSVALE, PENNSYLVANIA.

RELAY.

SPECIFICATION forming part of Letters Patent No. 62 5,146, dated May 16,1899.

Application filed May v25, 1898. Serial No. 681,710. (No model.)

To all Y1071/0771, t ntf/,y concern.:

Beit known that I, JOHN PREssLnY Conn MAN, a citizen of the UnitedStates, residing at Edgewood Park, in the county ofAllegheny and Stateof Pennsylvania, have invented or discovered certain new and usefulImprovements in Relays, of which improvements the following is aspecification.

The invention described herein relates to certain improvements indouble-pointed relays.

In the construction forming the subjectmatter of application, Serial No.667,265,1iled January 20, 1898, it will sometimes occur when the magnetsare feebly energized and one end of the armature is nearer its pole ofthe magnet than the opposite end of the armature to its pole that onlythe former end of the armature will be attracted, so that only onecircuit will be closed.

The object of the present invention is to insure the movement of bothcontact-plates against their contact-points under all conditions whenthe magnets are energized.

It is a further object of the invention to protect the relay as againstinjury from lightning or other abnormally heavy currents.

The invention is hereinafter more fully de scribed and claimed.

In the accompanying drawings, forming a part of this specification,Figure 1 is a sectional elevation of my improved relay, the plane ofsection being indicated by the line I I, Fig. 2. Fig. 2 isa plan View ofthe under side of the relay. Figs. 3 and 4 are sectional elevations, theplanes of section being indicated by the lines III III and IV IV,respectively, in Fig. 2. Fig. 5 is a View similar to Fig. 4,illustrating a modilication of my improvement; and Fig. 6 is a top planView of the relay. y

In the practice of my invention the magnets are held in position withtheir lower ends projecting through the top plate 2 by means of bolts 3,having one end connected to the supporting-frame 4 of the magnets andtheir opposite ends secured in the top plate 2. The

armature 5 is secured to a lever 6, attached l to a pin or shaft 7,whose conical ends are mounted in similarlyshaped holes in the ends ofsupporting-pins 8, screwing through lugs 8, formed on the under side ofthe top plate 2. On the under side of the lever 6 are formed lugs, oneof which is provided with a conical hole for the reception of one end ofthe pin 9, while the opposite end of said pin is mounted in a hole inthe end of a screw 9, passing through the other lug on thearmature-lever. As clearly shown in Figs. 1, 2, and 3, the pin 9 ismounted at right angles to the armature, so that a plate l0, secured tosaid pin midway of its length, will lie parallel to but below thearmature 5. To the ends of the plate 10 are secured the contact-plates11 11, butthe latter are insulated from the plate l0. These' resilientcontact-plates are so proportioned as regards their length that when thearmature is attracted to the magnet they will be drawnagainst thecontacts 13 and 13, which are preferably constructed inA the form ofbinding-posts passing through the top plate 2, but insulated therefrom.The lower ends of these posts are provided with sockets or recesses forthe reception of carbon blocks 14, adapted to serve as contact-surfacesfor the posts. It is preferred to coat these carbon blocks, except thecontact-face, with copper or other conducting material and to securethem in' position in the binding-posts by solder. rIlhe back contactsfor the contact-plates 1l and 11L are formed by screws 15 and 15,passing through bars 16 and 16a. As shown in Figs. land 2, one end ofthese bars is supported in but insulated from atbracket 17, formed onthe lower side of the top plate 2. The opposite ends of the bars aresecured to the lower ends of the binding-posts 18 18, passing throughbut insulated from the top plate 2.

In lien of securing the contact-plates 11 and 11' rigidly to thecarrier-plate 10 one or both thereof may be pivotally mounted to thecarrier-plate, as shown in Fig. 5. A desirable construction for soconnecting the contactplates to the carrier-plate consists .of an arm19, secured to the plate 10 adjacent to itsend, and a block 20, securedto the contact-plate 11, said arm and block `being pivotally connectedtogether by a pin 21. As shown in Fig. 5, the block 2O is between theouter or IOO left-hand end of the Contact-plate and the pivotal pin 21,so that the rear or right-hand end of the contact-plate will be normallyheld by the Weight of the block against the carrierplate 10, but isprevented from making eleotrieal connection therewith by insulatingmaterial on the under side of the plate or upper side ofthe'eontaet-plate.

It is customary to arrange a shunt-circuit, which may be elosed Wheneverthe magnetsl are denergized or may be closed only Whenthe magnets aredenergized and the front oroperative end of the contact-plate sticks oris welded to its contact-point. Then it is desired to close theshunt-circuit on each reverse movement of the armature, the contact-pinsand 15a are arranged on the bars 16 and 1G, as shown in Fig.4,and areprovided by preference With platinum points. W'hen the shunt-cireuitisto be closed only in oase ofthe adherence of the contact-plates to theirfront point-s, the pins 15 and 15 have their points formed o' insulatingmaterial, and additional contactpoints 22, provided with platin umpoints, are passed through the bars 10 and 1G, so that When thecontact-plates turn on their pivotal supports they will come in Contactwith these additional baek eontaets, as Clearly shown in Fig. 5. In easeit is desired to Close the shunt-circuit in the construction shown inFig. 5 every time the magnet is denergized, whether the Contact-plate isfused to its front Contact or not, the pins 15 22 are provided Withplatinum contact-points and both pins are included in the shunt-Circuit.

The bindingposts 13 13? 1S 1S and the binding-posts 23 25"L and 24 2lfor the track and signal circuits are secured, as heretofore stated, inthe top plate, but insulated therefrom. In order to protect the relayfrom lightning or other abnorm ally-heavy Currents, disks 25 withserrated edges are secured upon the binding-posts, as clearly shown inFig. 5. These posts are made of suoli a diameter -that the points of thedisk on one post will be adjacent to but not in Contact with the pointsof a disk on the adjacent binding-post, and the air-gap should be suchas to prevent the passage of a normal current, but not to present toogreat a resistance to abnormal eurrents. By loosening the clamping-nutsWhich hold these disks in position the latter can be adj usted around soas to bring new points into position when other points have been burnedaway.

I claim herein as my invention- 1. A magnet having in combinationtherewith a pivotally-mounted lever having an armature seeured thereto,a carrier-plate pivotally mounted with a freedom of automatic movementon the armature-lever, and contact-plates attached to saidCarrier-plate, substantially as set forth.

2. A magnet having in combination a pivotally-mounted armature-lever, acarrier-plate pivotally mounted on said lever, and contactplatespivotally mounted on the Carrier-plate, substantially as set forth.

In testimony whereof I have hereunto set my hand.

JOHN PRESSLEY COLEMAN iVitnesses:

DARWIN S. WoLooTT, F. E. GAITHER.

